diff options
Diffstat (limited to 'gdb/location.h')
| -rw-r--r-- | gdb/location.h | 233 |
1 files changed, 165 insertions, 68 deletions
diff --git a/gdb/location.h b/gdb/location.h index 602998d..0a2f179 100644 --- a/gdb/location.h +++ b/gdb/location.h @@ -46,8 +46,8 @@ enum offset_relative_sign struct line_offset { /* Line offset and any specified sign. */ - int offset; - enum offset_relative_sign sign; + int offset = 0; + enum offset_relative_sign sign = LINE_OFFSET_UNKNOWN; }; /* An enumeration of the various ways to specify a location spec. */ @@ -67,15 +67,104 @@ enum location_spec_type PROBE_LOCATION_SPEC }; -/* A traditional linespec. */ +/* A unique pointer for location_spec. */ +typedef std::unique_ptr<location_spec> location_spec_up; + +/* The base class for all location specs used to resolve actual + locations in the inferior. */ -struct linespec_location +struct location_spec { + virtual ~location_spec () = default; + + /* Clone this object. */ + virtual location_spec_up clone () const = 0; + + /* Return true if this location spec is empty, false otherwise. */ + virtual bool empty_p () const = 0; + + /* Return a string representation of this location. */ + const char *to_string () const + { + if (as_string.empty ()) + as_string = compute_string (); + if (as_string.empty ()) + return nullptr; + return as_string.c_str (); + } + + /* The type of this location specification. */ + enum location_spec_type type; + + /* Cached string representation of this location spec. This is + used, e.g., to save location specs to file. */ + mutable std::string as_string; + +protected: + + explicit location_spec (enum location_spec_type t) + : type (t) + { + } + + location_spec (enum location_spec_type t, std::string &&str) + : type (t), + as_string (std::move (str)) + { + } + + location_spec (const location_spec &other) + : type (other.type), + as_string (other.as_string) + { + } + + /* Compute the string representation of this object. This is called + by to_string when needed. */ + virtual std::string compute_string () const = 0; +}; + +/* A "normal" linespec. */ + +struct linespec_location_spec : public location_spec +{ + linespec_location_spec (const char **linespec, + symbol_name_match_type match_type); + + ~linespec_location_spec (); + + location_spec_up clone () const override; + + bool empty_p () const override; + /* Whether the function name is fully-qualified or not. */ symbol_name_match_type match_type; /* The linespec. */ - char *spec_string; + char *spec_string = nullptr; + +protected: + linespec_location_spec (const linespec_location_spec &other); + + std::string compute_string () const override; +}; + +/* An address in the inferior. */ +struct address_location_spec : public location_spec +{ + address_location_spec (CORE_ADDR addr, const char *addr_string, + int addr_string_len); + + location_spec_up clone () const override; + + bool empty_p () const override; + + CORE_ADDR address; + +protected: + address_location_spec (const address_location_spec &other); + + std::string compute_string () const override; }; /* An explicit location spec. This structure is used to bypass the @@ -83,24 +172,58 @@ struct linespec_location as linespecs, though. For example, source_filename requires at least one other field. */ -struct explicit_location +struct explicit_location_spec : public location_spec { + explicit_location_spec (); + + ~explicit_location_spec (); + + location_spec_up clone () const override; + + bool empty_p () const override; + + /* Return a linespec string representation of this explicit location + spec. The explicit location spec must already be + canonicalized/valid. */ + std::string to_linespec () const; + /* The source filename. Malloc'd. */ - char *source_filename; + char *source_filename = nullptr; /* The function name. Malloc'd. */ - char *function_name; + char *function_name = nullptr; /* Whether the function name is fully-qualified or not. */ - symbol_name_match_type func_name_match_type; + symbol_name_match_type func_name_match_type + = symbol_name_match_type::WILD; /* The name of a label. Malloc'd. */ - char *label_name; + char *label_name = nullptr; /* A line offset relative to the start of the symbol identified by the above fields or the current symtab if the other fields are NULL. */ - struct line_offset line_offset; + struct line_offset line_offset = {0, LINE_OFFSET_UNKNOWN}; + +protected: + explicit_location_spec (const explicit_location_spec &other); + + std::string compute_string () const override; +}; + +/* A probe. */ +struct probe_location_spec : public location_spec +{ + explicit probe_location_spec (std::string &&probe); + + location_spec_up clone () const override; + + bool empty_p () const override; + +protected: + probe_location_spec (const probe_location_spec &other) = default; + + std::string compute_string () const override; }; /* Return the type of the given location spec. */ @@ -108,13 +231,6 @@ struct explicit_location extern enum location_spec_type location_spec_type (const location_spec *); -/* Return a linespec string representation of the given explicit - location spec. The location spec must already be - canonicalized/valid. */ - -extern std::string explicit_location_to_linespec - (const explicit_location *explicit_locspec); - /* Return a string representation of LOCSPEC. This function may return NULL for unspecified linespecs, e.g, LINESPEC_LOCATION_SPEC and spec_string is NULL. @@ -124,27 +240,16 @@ extern std::string explicit_location_to_linespec extern const char * location_spec_to_string (location_spec *locspec); -/* A deleter for a struct location_spec. */ - -struct location_spec_deleter -{ - void operator() (location_spec *locspec) const; -}; - -/* A unique pointer for location_spec. */ -typedef std::unique_ptr<location_spec, location_spec_deleter> - location_spec_up; - /* Create a new linespec location spec. */ extern location_spec_up new_linespec_location_spec (const char **linespec, symbol_name_match_type match_type); -/* Return the linespec location spec of the given location_spec (which - must be of type LINESPEC_LOCATION_SPEC). */ +/* Return the given location_spec as a linespec_location_spec. + LOCSPEC must be of type LINESPEC_LOCATION_SPEC. */ -extern const linespec_location * - get_linespec_location (const location_spec *locspec); +extern const linespec_location_spec * + as_linespec_location_spec (const location_spec *locspec); /* Create a new address location spec. ADDR is the address corresponding to this location_spec. @@ -155,50 +260,42 @@ extern location_spec_up new_address_location_spec (CORE_ADDR addr, const char *addr_string, int addr_string_len); -/* Return the address (a CORE_ADDR) of the given location_spec, which - must be of type ADDRESS_LOCATION_SPEC. */ - -extern CORE_ADDR - get_address_location (const location_spec *locspec); +/* Return the given location_spec as an address_location_spec. + LOCSPEC must be of type ADDRESS_LOCATION_SPEC. */ -/* Return the expression (a string) that was used to compute the - address of the given location_spec, which must be of type - ADDRESS_LOCATION_SPEC. */ - -extern const char * - get_address_string_location (const location_spec *locspec); +const address_location_spec * + as_address_location_spec (const location_spec *locspec); /* Create a new probe location. */ extern location_spec_up new_probe_location_spec (std::string &&probe); -/* Return the probe location spec string of the given location_spec, - which must be of type PROBE_LOCATION_SPEC. */ - -extern const char * - get_probe_location_spec_string (const location_spec *locspec); - -/* Initialize the given explicit location. */ +/* Assuming LOCSPEC is of type PROBE_LOCATION_SPEC, return LOCSPEC + cast to probe_location_spec. */ -extern void - initialize_explicit_location (explicit_location *locspec); +const probe_location_spec * + as_probe_location_spec (const location_spec *locspec); -/* Create a new explicit location. If not NULL, EXPLICIT is checked for - validity. If invalid, an exception is thrown. */ +/* Create a new explicit location with explicit FUNCTION_NAME. All + other fields are defaulted. */ -extern location_spec_up - new_explicit_location_spec (const explicit_location *locspec); - -/* Return the explicit location spec of the given location_spec, which - must be of type EXPLICIT_LOCATION. */ - -extern struct explicit_location * - get_explicit_location (location_spec *locspec); - -/* A const version of the above. */ - -extern const explicit_location * - get_explicit_location_const (const location_spec *locspec); +static inline location_spec_up +new_explicit_location_spec_function (const char *function_name) +{ + explicit_location_spec *spec + = new explicit_location_spec (); + spec->function_name + = (function_name != nullptr ? xstrdup (function_name) : nullptr); + return location_spec_up (spec); +} + +/* Assuming LOCSPEC is of type EXPLICIT_LOCATION_SPEC, return LOCSPEC + cast to explicit_location_spec. */ + +const explicit_location_spec * + as_explicit_location_spec (const location_spec *locspec); +explicit_location_spec * + as_explicit_location_spec (location_spec *locspec); /* Return a copy of the given SRC location spec. */ |